what is tetrasodium edta

{"cid":"91222728","title":"99% Purity Tetrasodium EDTA 4Na 4H2O Natural Heavy Metal Chelators 13235-36-4","imgUrl":"https:\/\/img.chinax.com\/nimg\/22\/4f\/34afe73e1b185d11589e1a358e8c-200x200-1.jpg","attrs":{"Price":"CONTACT US","Brand Name":"ADDE TECHNOLOGY","Model Number":"ADDE-EDTA4NA","Minimum Order Quantity":"1000KG","Delivery Time":"7-10 days","Certification":"CE","Place of Origin":"CHINA","Payment Terms":"L\/C, T\/T","Supply Ability":"100 TON per month","Packaging Details":"25kg\/bag or packaged according to customer requirements.","Molecular Formula":"C10H12N2O8Na4 \u2022 4H2O","Molecular Weight":"452.23","CAS No.":"13235-36-4","Purity%:":"\u226599.0","Chloride \uff08 Cl\uff09%":"\u2264 0.01","Heavy metal (Pb)%":"\u2264 0.001"}}

{"cid":"91149632","title":"Restaurants Clean Hand Wipes \/ Natural Hand Wipes For Babies Spunlace","imgUrl":"https:\/\/img.chinax.com\/nimg\/b0\/05\/f8924f1118daf46a6032eecd0c42-200x200-1.jpg","attrs":{"Price":"USD 5-USD7 per roll","Brand Name":"OEM \/ Private Lable","Model Number":"GSL16026","Minimum Order Quantity":"2000 rolls","Delivery Time":"30 days","Certification":"ISO9001,ISO14001,ISO13485,CE,FDA,SGS,GMP","Place of Origin":"Guanddong,China","Payment Terms":"T\/T, L\/C","Supply Ability":"2,000 rolls per day","Packaging Details":"1 roll per bag, 4 rolls per carton","Item Name":"Premium, FDA Registered Disinfecting Wipes For All Sanitary Needed Place 800pcs","Material":"Spunlace,Paper,PP Spunbond,ES Thermal Bond etc","Size":"20*15cm or Your Size","Private Lable":"Yes","Sample":"Free","Rolls per carton":"4 rolls per carton"}}